Celestial hemisphere:  Northern  ·  Constellation: Cygnus (Cyg)  ·  Contains:  Crescent Nebula  ·  NGC 6888
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NGC 6888 - Crescent Nebula, Doug Bock
NGC 6888 - Crescent Nebula
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NGC 6888 - Crescent Nebula

Getting plate-solving status, please wait...
NGC 6888 - Crescent Nebula, Doug Bock
NGC 6888 - Crescent Nebula
Powered byPixInsight

NGC 6888 - Crescent Nebula

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Description

From Wikipedia:

The Crescent Nebula (also known as NGC 6888, Caldwell 27, Sharpless 105) is an emission nebula in the constellation Cygnus, about 5000 light-years away from Earth. It was discovered by William Herschel in 1792.[2] It is formed by the fast stellar wind from the Wolf-Rayet star WR 136 (HD 192163) colliding with and energizing the slower moving wind ejected by the star when it became a red giant around 250,000[3] to 400,000[citation needed] years ago. The result of the collision is a shell and two shock waves, one moving outward and one moving inward. The inward moving shock wave heats the stellar wind to X-ray-emitting temperatures.

Data:

August 29/30 2020 with August 16/17 data.

Out of 117 frames, 84 x 300 seconds used

Two sets of 50 flats used, one for each night due to slight configuration changes.

24 Darks

10" f/8 RC

Losmandy G11 mount

ZWO asi071mc PRO @ 300 gain and 0C temp (OSC) No Filters

Stacked in DSS

Processed in PI

Cosmetic cleanup in Gimp 2

DeNoise AI

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NGC 6888 - Crescent Nebula, Doug Bock